Located northeast of Alamosa, the Great Sand Dunes National Park & Preserve is an incredible 30-square-mile oasis that features a whopping 5 billion cubic meters of soft sand and one of the most dramatic landscapes in the state.
As per Buzzfeed, "One of the most unique landscapes in the US, you could easily imagine you're in the middle of the Sahara when you visit Great Sand Dunes National Park in southern Colorado," noting its changing colors throughout the morning, afternoon, and night.
Created as the Great Sand Dunes National Monument in 1932 and changed in 2004 to the Great Sand Dunes National Park and Preserve, there is plenty to see and do around the area, the most popular of which are hiking, sledding, and sandboarding.